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Date:      Thu, 30 Aug 2018 07:54:09 -0600
From:      Ian Lepore <ian@freebsd.org>
To:        Mark Millard <marklmi@yahoo.com>, freebsd-arm <freebsd-arm@freebsd.org>
Subject:   Re: FYI: how gpart show -p reports the same microsdhc card in a USB reader vs. in the microsdcard slot (on a Pine64+ 2GB)
Message-ID:  <1535637249.33841.64.camel@freebsd.org>
In-Reply-To: <5769CFF2-05D3-47CA-ABFA-52786C7C3B71@yahoo.com>
References:  <5769CFF2-05D3-47CA-ABFA-52786C7C3B71@yahoo.com>

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On Thu, 2018-08-30 at 02:39 -0700, Mark Millard via freebsd-arm wrote:
> [I do not currently have access to any alternates to the
> Pine64+ 2GB that have a micro sdcard slot. So I can not
> say that this is specific to the Pine64+ 2GB type of
> context: no evidence for other contexts.]
> 
> gpart show -p when the microsdhc card is in a USB-based
> reader:
> 
> =>      63  62333889    da4  MBR  (30G)
>         63     16380         - free -  (8.0M)
>      16443    131040  da4s1  fat32lba  [active]  (64M)
>     147483       997         - free -  (499K)
>     148480  62185470  da4s2  freebsd  (30G)
>   62333950         2         - free -  (1.0K)
> 
> =>       0  62185470   da4s2  BSD  (30G)
>          0  62185470  da4s2a  freebsd-ufs  (30G)
> 
> =>       0  62185470   ufsid/5b81680084249dc0  BSD  (30G)
>          0  62185470  ufsid/5b81680084249dc0a  freebsd-ufs  (30G)
> 
> =>       0  62185470   ufs/PINE642GBrootfs  BSD  (30G)
>          0  62185470  ufs/PINE642GBrootfsa  freebsd-ufs  (30G)
> 
> vs. when the same microsdhc card is in the mmcsd0 slot:
> 
> =>      63  62333889    mmcsd0  MBR  (30G)
>         63     16380            - free -  (8.0M)
>      16443    131040  mmcsd0s1  fat32lba  [active]  (64M)
>     147483       997            - free -  (499K)
>     148480  62185470  mmcsd0s2  freebsd  (30G)
>   62333950         2            - free -  (1.0K)
> 
> Despite what the mmcsd0 case does not show, it seems to
> work fine for the freebsd-ufs file system being the root
> file system for booting from /dev/mmcsd0 .
> 
> In fact the /etc/fstab used has:
> 
> /dev/ufs/PINE642GBrootfs        /               ufs
> rw,noatime          1 1
> /dev/label/PINE642GBboot        /boot/efi       msdosfs
> rw,noatime      0 0
> 
> which show up just fine:
> 
> # df -m
> Filesystem               1M-blocks  Used Avail Capacity  Mounted on
> /dev/ufs/PINE642GBrootfs     29400 26971    77   100%    /
> devfs                            0     0     0   100%    /dev
> /dev/label/PINE642GBboot        63     0    63     0%    /boot/efi
> 
> So the freebsd-ufs content is found and used.
> 

It's all but impossible to dig any meaning out of that jumbled wall of
text, but from the subject line I surmise you're saying that an sdcard
in a usb card reader shows a different geometry or size than that same
card in a native sd slot. That's normal and expected and has always
been so.

-- Ian



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